/Engine/Source/Runtime/CoreUObject/Public/Templates/SubclassOf.h
Construct from a UClass* (or something implicitly convertible to it)
template<typename U, std::enable_if_t< ![TIsTSubclassOf](API\Runtime\CoreUObject\Templates\TIsTSubclassOf)< std::decay_t< U >>::Value, decltype(ImplicitConv< [UClass](API\Runtime\CoreUObject\UObject\UClass) * >(std::declval< U >())) > *> TSubclassOf ( U && From )